Electrically-operated sifter.



J. P. BECK & W. LINDSAY. BLEGTRIO'ALLY OPERATED SIFTEE.

APPLIUATION FILED AUG. 28, 1907.

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Patented. June 6, mi

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lies/ices 21,513 UEAGTU 51113 St 2/ Patented done 6 di it Ago, Election f led August as, 1997. serial E10, sea-lee.

To all who-m may concern:

Be it known that we dons ii. Boon and i VILLIAM limnsar, citizens oi. the United States residingthe city of Chicago, county of (look, and. State or llli ois, have invented certain new and useful improve morale in Electricallvflperated Sifters, of which the following is a specification.

This invention relates to improvements in electrically operated sifters and in the construction shown is adapted to sift enamel powder r coating which is to be applied to metal manufactures, but or lcourse may he used to sift various other maierial's.

Among the salient objects of the invention are to provide electrically operated sitter which is actuated by a simple motor driven from any suitable current source; to provide novel hinge connections between the supporting casing and vibratorysii'ter box, which are such as to afford practically free or frictionless vibration of the sifter box; to provide a construction in which the armature shaft of the motor actuates the driving shaft of the sitter by means or simple and .direct connections; to provide a simple unitar-y structure in which the actuating mechanism is so arranged i it may he concealed and protected in a casing; to provide means for controlling the operation of the "notorconsisting in simple thumb-pressed contact maker controlled by one hand of the operator; to provide a relatively light and nortable device; and in general to provide an improved construction of the character referred. to;

Referring" to the drawings Figure is a longitudinal vertical sectional view of our device with parts broken away to reduce the size of the drawing. 2 is a perspective view of the side of the Sifter ho showing'the novel'hinge supports and a fragmentary portion of the driving shaft and. inclosing casinn; 3 is a transverse sectional view ken through lines 33 of Fig. 1. Fig. i is a fragmentary detail view showing a modified construction or" the driving connections between the armature shaft and actuating shaft of the sitter.

In the drawings -l designates a whole a sitter box open at the upper side and provided cotton: with a screen or sieve T2 of the desired 1 @oeratively connected with the Sifter box is a driving shaft a which reciprocates within a tubular casing member 5 and is adapted to vibrate the Sifter hex.

Describing now the manner of connecting the casing and sh aft to the sitter we provide hinged oscillatory connections between. the tubular supporting casing and the Sifter icon which permit of limited vibration of the latter when the driving shaft is actuated and avoids the friction incident to guides and analogous supports. To this end-a bracket 6 having a split ring 7 with a, pair of cars 8 is clamped over one end of the tube 5 by means of a screw bolt This bracket also comprises a pair of downwardly extending arms 10 each of which'terrninates in a lug 1L The arms 10 support a through rod 12 each end of which extends through the lugs 311 so as to form journal extensions 13. Upon the rear face of the Sifter lJC-X is lined a bracket 16 by means of screws ll? inserted through The upper end of this bracket 15 cars 18,

centrally provided with an enlarged nutlike socket portion 18 and upon each e ter 19 journal extensions. The main driving shaft v 4i is connected to the hraclr't- {by means or" a shaft section 23 screw threaded at one end into the tubular shaft 4 and at its other fastened in the socket 18 by means or an impinging screw 24. llhe object of this construction is to permit the main portion of the shaft to he made hollow so as to decrease its weightand at the same time secure strong connections between the shaft and the siitcr cox, inasmuch as the connecting arms 21 are pivotally mounted on their respective journal pins, it will be seen that the supporting straps have free oscillatory movement. inasmuch as the shaft 4 is confined within the tubular casing member 5, it will he seen ios scarce mote-r of the direct current type and comprises ordinary horseshoe magnet 24,

core a field windings armature 2'7, corn- :mutator 28 and brushes 29, The armature shaft 30 extends upwardly and is provided with reduced extension 31 constituting an eccentric wrist as will be hereinafter described. Between the pole pieces is secured a cross piece 2% of non magnetic material, in which is formed a step bearing 24 which supports ti e lower end of the armature The lower end of the motor is provided with a foot or supporting block 32, which is adapted to rest on the floor when the device is in use.

in order to connect the'end of the tubular casing 5 to the top of the motor so that the two may mutually support each other, we provide a brass or other suitable bracket 33, the upper arm of which is provided with a split ring 34 adapted to he clamped over the end of the casing 5 by means of a screw inserted through upstanding cars 36. The lower arm of the bracket is secured to i one of the field pieces by ascrew 37. The

bracket also comprises a cross piece 38 which secured to the opposite field piece as at 37 and has an integral journal portion 39 through which the armature shaft passes.

in order to connect the driving shaft 4: the armature shaft 30, the latter has a solid extension 40 one end of which is screw (led into the shaft 4 while its other end is provided with a head 41 which is tured so as to fit over the eccentric e22- the armature shaft 30 and is in hy means of a screw our; he that as the armature es will. transmit a reciprosha'ft -10 and main e circuit through the motor posts 48-43 respect ely ch are supported ahcve tubular casing 5 by piece '3, 43' is contact p c c 45 sevotally connected to The contact from the arm hy the upper contact l on t of en;

L119 tube me he men-i a J the motor, a pair of insulated wires 51, 52, conne i ith any suitable source of current id in through the casing at the top thereof, As seen clearly in Fig. 1, the passes down to and through the field windings 26 thence from the field windings to the contact screw 52 of one brush, th thrcu 'h he brush and windin 's the second lYLUSiL tact screw 53 of the latter, a wire 50' leads through an insulating block 54 secured to the bra cket 83 and thence to the contact post 1 3. The other wire 51 passes through the insulated block 5% to the other contact post 43. i

The motor is inclosed in a hex-like casing 55, the upper side of which is cut away so as to fit around the bracket 33 while the top and bottom are provided withapertures for the wires 50 and 51 and the foot 32 respectively.

In Fig. i We have shown modification of the driving connections between the armature shaft 30 and the stub shaft 10, de signed to permit the motor shaft and sitter actuating shaft to be arranged in alineinent. To this end, the armature shat provided with a cam head 56 in which is cut a cam groove 57. The stub shaft 40 terminates in a yoke having arms 58 and 59 respectively. The upper arm 59 terminates in a collar 60 which fits and slides on the armature shaft 30. 59 is provided with a cam stud 61 arranged to engage the cam groove 57. The rotation of the cam imparts reciprocatory movement to the sitter shaft, as in the previously described construct-in The device of either of the two modifications shown is ope 'ated by placing a suitahle charge of pulvcrulcnt material in the Sifter, grasping" the handle of the device between the motor and sitter, and holding the sitter in freely'extended and supported position, and while so held closing the switch and moving the shift/r receptacle hack. forth over the device he coated. The weight of the motor acts as counterbalance to the weight rrf the sitter receptacle and the charge therein, in this way materially lessens the labor and tigue of holding the sitter in the freely extended position which is necessary to properly use the device. The direct connection between the sitter receptacle and the armature of the motor insures a comparatively smooth shaking movement avoids the disagreeable incident to prior devices in which the sitter receptacle is agitated by hammer-Like blows or con-- cushion. The circuit controlling switch is so located that it may be opened and closed without changing the position of one of the hands grasping the handle for sup-porting the sitter while operating it. motor is so organized that it may be used from ordinary electric lighting systems, and the sift-er may therefore be used without any special equipment in any factory or room which is Wired for electric lighting or power, and this feature in itself is an inn portant consideration;

Ether modifications in construction and may he made without departt :2 invention tis - the vibratory We claim as our invention:

it. The combination with a sieve, a handle therefor, an electric motor mounted to be carried by the handle, a shaking or vibrating device operatively associated with the sieve, and power transmittin means between the vibrating device and the electric tween the electrically operated devices and the shiftable part.

3. The combination of a sieve, a handle therefor, vibratory means associated with the handle in approximately the plane thereof, an electric motor and power transmitting means between said motor and said vibratory means, the motor and power transmitting means being arranged at one side of the handle and its associated parts to balance the device, and maintain the sieve in operative position.

4-. The combination or" a sieve, and vibratory means therefor, anlelectric motor suspended therebeneath, power trans mitting means intermediate the motor and devich, and means for controlling the actuation. of the device arranged above the supporting means, substantially as described.

5. The combination oi a sieve, a handle therefor, vibratory means associated with the handle in approximately the plane thereof, and instrumentalities'comprising an electric motor provided with power transmitting means operativeiy associated with said vibratory means, said motor Ming arranged laterally of the handle and its associated parts. to assist in counterbalancing the weight of the latter when the handle is grasped by the hand of the user.

6. In a hand tool, the combination oi a sieve, a handle, vibratory means for shaking the sieve, an electric motor operatively associated with said vibratory means for acmating the same, means for mounting the motor at the end of the tool opposite the sieve and at a point beyond the handle, the handle being arranged between said motor and the sieve whereby the motor balances the sieve, and means carried with the tool for controlling the operation of the vibrating means.

7. in a hand tool, the combination of a sieve, vibratory means for shaking the sieve including a rod, an electric motor opera= tively associated'with said vibratory means for actuating the same, and'means for detachahly mounting; the motor so e supporting same is carried by the sieve including a detachable coupling between said rod and the motor shaft.

8. In a portable manually-held sitter, the combination with a sitter receptacle, a bandle attached at one end of said sitter receptacle, an electric motor carried by the other end of said handle whereby said parts are balanced in supported position, a driving shaft positively connected at one end to the motor and at its other end to the receptacle whereby electrical actuation of the motor imparts a shifting movement to the receptacle.

9/111 combination with a sitter receptacle. a reciprocatory sitter shaft fixed at one end to said receptacle, a tubular casing mem ber surrounding said shaft, hinged connections between said casing and said receptacle, an electric motor having an armature shaft extension, supporting connections between said casing motor, and positive inechanicalconnections between the armature shaft extension and one end of said sitter shaft whereby the rotation of the former reciprocates the latter.

it in a portable manually-held sitter, the combination of a sitter receptacle, a reciprocatory shaft having one of its ends positively connected to said receptacle, an electric motor having an armature extension rotating with the armature thereof, and operative connections between said armature extension and said reciprocatory shaft,

whereby the sitter receptacle is reciprocated positively by and with. the reciprocating shaft.

in a portable manually-held sitter, the combination of sitter receptacle, a reciprocatory sl i t having one of its ends positively connected to said receptacle, an electric motor an armature extension rotating with the armature thereof, operative connections between said armature extension and said reciprocatory shaft, whereby the sitter receptacle is reciprocated positively by and with the reciprocating shaft, and

manually operable switch located upon that I part of the contrivance normally grasped in supporting and operating the device, ar-' ranged to control the circuit connections of said motor.

12. in combination with a portable sitter receptacle, a tubular casing member constituting a handle, hinge-like link coroner, tions between said tubular casing member and said receptacle, a reciprocatory shaft extending through said handle and connected at one end to said receptacle, an electric motor mounted upon the opposite end of the handle, and positive mechanical connwtions between said shaft and the armature shaft y a reciprocatory moimpartedto said shaiit vvhen said is driven.

13. In combination with a sifter receptacle, a shaft casing constituting also a bandle, a bracket extension upon said "casing member, a pair of links pivotally connected at one end to said bracketand at the other end pivotally connected to said sifter memher, a shaft connected at one end to said sifter receptacle, and extending through, but supported out of contact with, said casing member, a bracket upon the end of said casing member remote from the sifter box and an electric motor operatively mounted upon, and supported by said latter bracket and positive mechanical connections between the armature shaft of the motor and said sifter shaft.

14. In combination With a sifter receptacle, a tubular casing constituting a handle, a bracketextension upon said casing, a pair of hinge-like links operatively connecting the sifter receptacle with said bracket; an actuating shaft extending through the tubular casing'and connected at one end to the sifter receptacle, an electrical motor mounted upon the end of the tubular casing remote from the sifter receptacle, operative connections between the armature shaft of the motor and actuating shaft of the sifter, suitable circuit connections for operating the motor and a manually controlled switch lever mounted upon the tubular handle casing at a point intermediate the length of the latter and controlling said circuit connection's.

15. In a portable sifter, a combination of .a tubular handle member, a sifter box, hinge-like link connections between the end of the tubular handle and ,the side of the sifter box, a shaft extending through said tubular handle and operatively connected with the approximate side of the sifter box, a motor supporting bracket mounted upon the end of the handle remote from the sifter box and provided with an armature shaft journal portion extending at right angles to the longitudinal axis of the handle, an electric motor rigidly supported upon said bracket with its armature extending through the journal portion thereof, an eccentric rest upon said armature shaft operatively connected with the corresponding end of the sifter actuating shaft, suitable circuit connections for operating the motor and a manually controlled switch controlling said circuit connections.

16. In a portable sifter, a combination of a tubular handle member, a sifter box,

hinge-like link connections between the end of the tubular handle and the side of the sifter box, a shaft extending through said tubular handle and operatively connected with the approximate side of the sifter box, a motor supporting bracket mounted upon the end of the handle remote from the sifter box and provided with an armature shaft journal portion extending at right angles to the longitudinal axis of the handle, an electric motor rigidly supported upon said bracket with its armature extending through the journal portion thereof, an eccentric rest upon said armature shaft operatively connected with the corresponding 'end of the sifter actuating shaft, suitable circuit connections for operating the motor and a manually controlled switch controlling said circuit connections, and a box-like casing oompletely inclosing the electric motor. 1.7. In a portable sifter, the combination with a tubular handle member, a sifter box movably supported upon one-end of said handle andan actuating shaft connected with the sifter box and extending through the handle, of an electric motor having its frame portion rigidly united with the end of said handle remote from the sifter box, with the axis of its armature shaft arranged at right angles to the axis of the handle, a foot extension upon the end of said motor frame remote from the handle and operative connections between the motor and sifter actuating shaft.

JOHN F. BECK. WILLIAM LINDSAY. Witnesses: FRANK L. BELKNAP, ALBERT H. -GRAVES. 

